/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.oozie.action.hadoop;

import org.apache.hadoop.conf.Configuration;

public final class ActionUtils {

    private ActionUtils() {
        // no instances
    }

    public static void setStrings(Configuration conf, String key, String[] values) {
        if (values != null) {
            conf.setInt(key + ".size", values.length);
            for (int i = 0; i < values.length; i++) {
                conf.set(key + "." + i, values[i]);
            }
        }
    }

    public static String[] getStrings(Configuration conf, String key) {
        String[] values = new String[conf.getInt(key + ".size", 0)];
        for (int i = 0; i < values.length; i++) {
            values[i] = conf.get(key + "." + i);
            if (values[i] == null) {
                values[i] = "";
            }
        }
        return values;
    }

}
